Hey, guess what? TransCanada just got final approval to build its pipeline from the tar sands of Alberta all the way to the Gulf Coast of Texas. Done and done.

I know, I know: The Keystone XL pipeline has been held up. You protested at the White House to stop it. That’s cool. But what you may not know is that Keystone XL would augment a section of pipeline that already brings tar-sands oil from Canada to Nebraska. On Friday, the Army Corps of Engineers signed off on the last permits TransCanada needed for a still-empty stretch from there to the Gulf Coast. Which means that the company will soon have a complete shunt traversing the entire height of the United States.

President Barack Obama encouraged TransCanada to move ahead with the segment that will run from a refinery in Cushing, Okla. to Texas after he rejected the broader [Keystone…